After you have played with the waterfall illusion (or motion aftereffect) demo describe your experience, explain briefly in your own words what a motion after effect is, and say why it occurs.

After you have played with the waterfall illusion (or motion aftereffect) demo in the lecture (and also see the link below), describe your experience, explain briefly in your own words what a motion after effect is, and say why it occurs. I am not interested in your opinion but in what the science has to say about this.

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